As in previous years, and despite the risk of being wrong, manufacturers have already started making accessories based on the specifications.
The diagrams below show an iPhone 5S handset that looks like the iPhone 5 with the same 4-inch screen, home button, and FaceTime camera. The low cost iPhone or 'iPhone Lite' is shown to be slightly wider and taller, as well as 0.8 mm thicker than the 5S. It has rounded off back edges similar to the iPod classic.
Below you can see a rendering by a well-known third party case manufacturer that attempts to recreate the 'iPhone Lite' based on the blueprints they have obtained.
Check out the images below...